| 64 | #endif |
| 65 | |
| 66 | static void disk_image_backward(int disk_dst, disk_t *disk, const uint64_t src_offset_start, const uint64_t src_offset_end, uint64_t dst_offset) |
| 67 | { |
| 68 | uint64_t src_offset; |
| 69 | unsigned char *buffer=(unsigned char *)MALLOC(disk->sector_size); |
| 70 | for(src_offset=src_offset_end-disk->sector_size; src_offset > src_offset_start; src_offset-=disk->sector_size, dst_offset-=disk->sector_size) |
| 71 | { |
| 72 | const ssize_t pread_res=disk->pread(disk, buffer, disk->sector_size, src_offset); |
| 73 | if((unsigned)pread_res != disk->sector_size) |
| 74 | { |
| 75 | free(buffer); |
| 76 | return; |
| 77 | } |
| 78 | #if defined(HAVE_PWRITE) |
| 79 | if(pwrite(disk_dst, buffer, pread_res, src_offset)<0) |
| 80 | { |
| 81 | free(buffer); |
| 82 | return; |
| 83 | } |
| 84 | #else |
| 85 | if(lseek(disk_dst, src_offset, SEEK_SET)<0) |
| 86 | { |
| 87 | free(buffer); |
| 88 | return; |
| 89 | } |
| 90 | if(write(disk_dst, buffer, pread_res) != pread_res) |
| 91 | { |
| 92 | free(buffer); |
| 93 | return; |
| 94 | } |
| 95 | #endif |
| 96 | } |
| 97 | free(buffer); |
| 98 | } |
| 99 | |
| 100 | int disk_image(disk_t *disk, const partition_t *partition, const char *image_dd) |
| 101 | { |